.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 20px;
}

.login-form {
  width: 100%;
  max-width: 400px;
  padding: 2.5rem;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-form h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: #333;
  font-size: 2rem;
  font-weight: 600;
  position: relative;
}

.login-form h2::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  margin: 10px auto 0;
  border-radius: 2px;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #555;
  font-size: 0.95rem;
}

.form-control {
  width: 100%;
  padding: 1rem;
  border: 2px solid #e1e5e9;
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.3s ease;
  box-sizing: border-box;
  background-color: #fff;
}

.form-control:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  transform: translateY(-2px);
}

.form-control.is-invalid {
  border-color: #e74c3c;
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.invalid-feedback {
  display: block;
  width: 100%;
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: #e74c3c;
  font-weight: 500;
}

.btn {
  display: inline-block;
  font-weight: 600;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: none;
  padding: 1rem;
  font-size: 1.1rem;
  line-height: 1.5;
  border-radius: 8px;
  transition: all 0.3s ease;
  cursor: pointer;
  width: 100%;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
  background: #95a5a6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.alert {
  padding: 1rem;
  margin-bottom: 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 500;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.alert-danger {
  color: #fff;
  background: linear-gradient(135deg, #e74c3c, #c0392b);
  box-shadow: 0 4px 15px rgba(231, 76, 60, 0.2);
}